1 | /* |
2 | Copyright (C) 2010 Colin Guthrie <cguthrie@mandriva.org> |
3 | Copyright (C) 2013 Harald Sitter <sitter@kde.org> |
4 | |
5 | This library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) version 3, or any |
9 | later version accepted by the membership of KDE e.V. (or its |
10 | successor approved by the membership of KDE e.V.), Nokia Corporation |
11 | (or its successors, if any) and the KDE Free Qt Foundation, which shall |
12 | act as a proxy defined in Section 6 of version 3 of the license. |
13 | |
14 | This library is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | Lesser General Public License for more details. |
18 | |
19 | You should have received a copy of the GNU Lesser General Public |
20 | License along with this library. If not, see <http://www.gnu.org/licenses/>. |
21 | */ |
22 | |
23 | #include "pulsestream_p.h" |
24 | |
25 | #include <qmath.h> |
26 | |
27 | #include "pulsesupport.h" |
28 | |
29 | namespace Phonon |
30 | { |
31 | |
32 | PulseStream::PulseStream(QString streamUuid, QString role) |
33 | : QObject() |
34 | , mStreamUuid(streamUuid) |
35 | , mIndex(PA_INVALID_INDEX) |
36 | , mDevice(-1) |
37 | , mMute(false) |
38 | , mCachedVolume(-1) |
39 | , mRole(role) |
40 | { |
41 | pa_cvolume_init(a: &mVolume); |
42 | } |
43 | |
44 | PulseStream::~PulseStream() |
45 | { |
46 | } |
47 | |
48 | QString PulseStream::uuid() const |
49 | { |
50 | return mStreamUuid; |
51 | } |
52 | |
53 | uint32_t PulseStream::index() const |
54 | { |
55 | return mIndex; |
56 | } |
57 | |
58 | void PulseStream::setIndex(uint32_t index) |
59 | { |
60 | mIndex = index; |
61 | } |
62 | |
63 | uint8_t PulseStream::channels() const |
64 | { |
65 | return mVolume.channels; |
66 | } |
67 | |
68 | void PulseStream::setDevice(int device) |
69 | { |
70 | if (mDevice != device) { |
71 | mDevice = device; |
72 | emit usingDevice(device); |
73 | } |
74 | } |
75 | |
76 | // Copied from AudioOutput |
77 | static const qreal LOUDNESS_TO_VOLTAGE_EXPONENT = qreal(0.67); |
78 | static const qreal VOLTAGE_TO_LOUDNESS_EXPONENT = qreal(1.0/LOUDNESS_TO_VOLTAGE_EXPONENT); |
79 | |
80 | void PulseStream::setVolume(const pa_cvolume *volume) |
81 | { |
82 | if (mCachedVolume != -1) |
83 | QMetaObject::invokeMethod(obj: this, member: "applyCachedVolume" , c: Qt::QueuedConnection); |
84 | if (pa_cvolume_equal(a: &mVolume, b: volume) == 0) { |
85 | memcpy(dest: &mVolume, src: volume, n: sizeof(mVolume)); |
86 | qreal vol = (qreal)pa_cvolume_avg(a: volume) / PA_VOLUME_NORM; |
87 | // AudioOutput expects the "backend" to supply values that have been |
88 | // adjusted for Stephens' law, so we need to fudge them accordingly |
89 | // so that the %ages match up in KMix/the application's own slider. |
90 | emit volumeChanged(volume: qPow(x: vol, y: VOLTAGE_TO_LOUDNESS_EXPONENT)); |
91 | } |
92 | } |
93 | |
94 | void PulseStream::setMute(bool mute) |
95 | { |
96 | if (mMute != mute) { |
97 | mMute = mute; |
98 | emit muteChanged(mute: mMute); |
99 | } |
100 | } |
101 | |
102 | qreal PulseStream::cachedVolume() const |
103 | { |
104 | return mCachedVolume; |
105 | } |
106 | |
107 | void PulseStream::setCachedVolume(qreal volume) |
108 | { |
109 | mCachedVolume = volume; |
110 | } |
111 | |
112 | QString PulseStream::role() const |
113 | { |
114 | return mRole; |
115 | } |
116 | |
117 | void PulseStream::applyCachedVolume() |
118 | { |
119 | if (mCachedVolume == -1) |
120 | return; |
121 | PulseSupport::getInstance()->setOutputVolume(streamUuid: mStreamUuid, volume: mCachedVolume); |
122 | mCachedVolume = -1; |
123 | } |
124 | |
125 | } // namespace Phonon |
126 | |
127 | #include "moc_pulsestream_p.cpp" |
128 | |
129 | // vim: sw=4 ts=4 |
130 | |